After looking a the room for a bit Lebwen says "Well if the maggots are alive then it probably isn't directly deadly... What do you see for magic Adelbert?" Coming up with an idea Lebwen goes back into the last room and finds or breaks off a couple pieces of wood from one of the covers they hadn't moved and heads back to the room. The first small piece he tosses into the room. Assuming nothing drastic happens with that, he'll take a longer piece of wood and poke it into the room, trying to feel for any sort of magical interface or barrier between what's causing the items to float and the outside.